.input
  width 100%
  height 150px
  background #f3f5f9
  border 1px solid #e3e7ef
  border-radius 3px
  transition .3s
  padding 10px 20px
  resize none
.area
  &.active
    .input
      border-color #4bacf6
      background #fff
      box-shadow 0 0 4px #c0e6fb
.msg
  height 14px
  font-size 12px
  color #9faebf
  